Pump-valve.



A. P. BROWN.

PUMP VALVE. APPLICATION FILED JULY 9A 1915.

1, 182,746. Patented May 9, 1916.

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ALEXANDER P. BROWN, 0I' LONG ISLAND CITY, NEW YORK.

PUMP-VALVE.

Application led July 9, 1915.

To ZZ 'zo/wm t may concern Beit known that I, ALEXANDER P. BROWN, aresident of Long Island City, in the county of Queens and State of NewYork, have invented certain new and useful Improvements in PumplValves,of which the follow ing is a specication.

The present invention relates to improvements in bellows, and moreparticularly to an instrument of this type which is particularly adaptedfor the use ot' piano makers, although suited for other purposes also.

Piano makers need two kinds of bellows, to wit: one of the suction type,and another one of the force or compression type. The A suction bellowsis used for sucking dust from the tracker bars of player pianos and forsimilar purposes; and the compression bellows is made use of forproducing a current of air, for instance, for cleaning the interior ofpianos and other musical instruments.

One of the objects of the present invention is to provide .a bellowswhich is convertible from one of the types mentioned into the other one,or in other words a bellows which by a simple adjustment can be.

made to operate either as a suction pump or as a force pump.

Another object of the invention is to produce a device of this typewhich is simple in construction, efi'icient in operation, and which canbe manufactured on a commercial scale, or in other words which is not sodifficult to construct as to be beyond the reasonable cost of such anarticle.

With these and other objects in view, which will more fully appear asthe nature of the invention is better understood, the same consists inthe combination, arrangement and construction of parts hereinafter fullydescribed, pointed out in the appended claim and illustrated in theaccompanying drawings, it being understood that many changes may be madein the size and proportion of the several parts and details ofconstruction within the scope of the appended claim without departingfrom the spirit or sacrificing any of the advantages of the invention.

Two of the many possible embodiments of the invention are illustrated inthe accompanying drawings, in which:

Figure 1 is a longitudinal vertical section taken through a bellowsconstructed in ac- Speccation of Letters Patent.

Patented May 9, 1 916.

Serial No. 39,021.

cordance with the present invention; Fig. 2 1s a section taken on line 22 of Fig. 1, on a larger scale; Fig. 3 is a section taken on line 33 ofFig. 2; Fig. 4 is a section similar to the one shown in Fig. 2 with theparts in other positions; Fig. 5 is a longitudinal vertical sectiontaken through a piston embodying the invention; Fig. 6 is ay similarsection taken through the piston with the parts in other positions; andFig. 7 is a section taken on line 7 7 of Fig. 6.

Referring now more particularly to Figs. 1 to 1, inclusive, the numerals10 and l1 indicate the two boards of the bellows, united by sides 12 ofthin leather or the like, thus forming a flexible air chest, which is inthe well known manner alternately eX- panded and contracted. From theair chest leads a nozzle 13, as usual in constructions of this type. Inthe upper face of the board 11 is formed a recess 11, that is closed bya cover 15, the latter being attached to the outer face of the board 11,for instance, by screws 16. The closed recess constitutes, as willhereinafter appear, the valve chamber of the bellows. In the board 11 isformed a plurality of openings 17, in the present case two, throughwhich the air chest is adapted to communicate with the valve chamber. Inalinement with the openings 17 are provided in the cover 15 openings 18,through the latter being adapted to be established a communicationbetween the valve chamber and the atmosphere. Around the openings 17 and1S are formed within the valve chamber valve seats 19 and 20,respectively, said valve seats being made of rings ot felt. or ofsimilar material, which are secured to the board 11 and the cover 15,respectively, for instance by a suitable adhesive. IVith the valve seatscooperates a valve 21. in the form of a plate member, that is looselymounted upon a. valve stem 22, the latter extending through the board 11and through an open ving 23 in a protuberance 2l on the cover.

The valve is provided with a small aperture 25, through which the stem422 extends, there being disposed upon said stem below the valve a collar26, and above the same a collar 27. The collars are disposed at adistance from each other, to permit of a sliding motion of the valveupon the stem for a purpose hereinafter to be described. A spring 28 iscoiled around the stem 22,

and bears against the collar 27 and the cover 15. The outer end of thestem, which projects through the opening 28, is pivoted at 29 to `anactuating lever 30, the latter being provided with a cam 31s that isadapted to coperate with the protuberance 24. To the board 1.1 isfastened a pin 32, projecting into the valve casing and being seated ina slot 33 in the valve. The move ment of the valve is guided by the saidpin and slot. Y

From the foregoing it appears that the bellows includes a double facevalve, having two opposed sets of seats, one set being formed above thevalve and the other one below the same, and the valve being shiftable tocoperate with either set of seats.

The operation of this device is as follows: 1f it is intende-d to usethe bellows as a suction pump, for instance for sucking dust from thetracker bars of pla-yer pianos, a properly shaped cap 34 is put uponthenozzle. This cap is pressed against the tracker bars. The lever 30 isset to permit the valve 21 to descend on its seats 19. The spring 2Swill, upon the shifting of the lever into the positions shown in Figs. 1and 2 of the drawings, force the valve onto the said seats. 1f now theair chest of the bellows is expanded, airy and dust is drawn into thesame through the nozzle 13, the valve being forced by the atmosphereonto its seats 19, and unseated when the air chest is contracted, theair and dust being by the contraction expelled from the bellows throughthe openings 17 and 1S. l/Vhen the bellows is to be used as a force orcompression pump, the lever 30 is shifted into the position shown inFig. 4 of the drawings, whereby the stem 22 and the valve are raised andthus brought into operative relation to the valve seats 20. The cam 31,acting upon the protuberance 24, holds the valve in its raised position.W' hen in this position, air is drawn through the valve chamber into theair chest on the extension stroke and expelled through the nozzle whenthe said chamber is being compressed. fr current of air is thus producedfor cleaning, for instance, the interior of pia-nos and other musicalinstruments. Attention is called to the fact that, when acting as aforce or compression pump, upon extension the valve is kept a littledistance below the seats 20, thereby permitting' ingress of air, andupon compression the said valve acts as check valve and is forced ontoits seats 20.

1t is to be observed that while herein the bellows has been described ashaving two sets of registering openings, any other suitable number maybe employed without departing from the invention.

The invention may be applied to piston pumps also. A construction ofthis pipe is illustrated in Figs. 5 to 7, inclusive, in which thenumeral 35 designates a piston, having a recess 36, closed by a cover37. This closed recess constitutes the valve chamber of thepump. rThepiston is provided with valve openings 3S, and in registering positiontherewith are made in the cover valve openings 39. lVithin the valvechamber are formed around the valve openings 38 and 39 valve seats 40and 41, respectively, with which cooperates a double face valve 42 inthe form of a plate member. This valve is loosely mounted between theflanges 43 and 44 of a nut 45, said nut having an extension 46, providedwith a slot 47. In alinement with this slot is formed in the valve anaperture 42, and in the latter and in the said slot is seated astationary pin 48. The pin, aperture and slot serve as the guiding meansfor the valve and nut, and prevent also a rotation of the nut. lVith thethreads of the nut mesh those of a bolt 49, having a head 49 outside ofthe piston, its other end projecting into a bore in a piston rod 51,that is, preferably, fiXedly attached to said bolt, for instance by apin 52. The operation of this device is as follows: By rotating thepiston rod 51 in one or the other direction, the valve will be shiftedinto operative relation with one or the other set of valve seats. vVhencoperating with one set of seats, the pump will act as a suction pump,and when coperating with the other set, it will constitute a force orcompression pump.

lt is to be observed that the two structures herein described are alike,the only difference between the two residing in the means for shiftingthe valve into operative relation with the two sets of valve seats.

What I claim is A valve casing having registering openings in oppositewalls thereof, valve seats formed around said openings within saidcasing, a valve stem shiftably arranged in said casing, a valve looselymounted upon said stem, means upon said stem for limiting the motion ofthe valve thereon, and means engaging said stem for shifting the sameand thereby bringing, at will, said valve into operative relation witheither valve seat. v

Signed at New York, in the county of New York, and State of New York,this 7th day of July, A. D. 1915.

ALEXANDER P. BROWN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

